1.
Evolution of Insects - Philip S. Callahan - Hardcover
by Callahan, Philip S.
ISBN: 9780823402137
List Price: $5.95
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Birds and how They Function - Philip S. Callahan - Hardcover
by Callahan, Philip S.
ISBN: 9780823403639
List Price: $8.95
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Light, Radiation and You: How to Stay Healthy
by Ott, John N., Hollwich, F.,...
ISBN: 9780815953142
List Price: $16.95
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Ancient Mysteries, Modern Visions The Magnetic Life
by Callahan, Philip S.
ISBN: 9780911311082
List Price: $16.00
7.
Tuning in to Nature Infrared Radiation And the Insect Communication System
by Callahan, Philip S.
ISBN: 9780911311693
List Price: $20.00
8.
Tuning in to Nature Solar Energy, Infrared Radiation,&the Insect Communication System
by Callahan, Philip S., Brogdo...
ISBN: 9780815963097
List Price: $34.95
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Paramagnetism Rediscovering Nature's Secret Force of Growth
by Callahan, Philip S.
ISBN: 9780911311495
List Price: $15.00
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11.
Nature's Silent Music A Rucksack Naturalist's Ireland
by Callahan, Philip S.
ISBN: 9780911311334
List Price: $20.00
13.
Light, Radiation and You : How to Stay Healthy
by Ott, John N., Hollwich, F.,...
ISBN: 9780685578124
List Price: $9.95
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Tuning into Nature: Solar Energy, Infrared Radiation and the Insect Communication System
by Philip S. Callahan
ISBN: 9780710086945
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Magnificent Birds of Prey - Philip S. Callahan - Hardcover
by Callahan, Philip S.
ISBN: 9780823402489
List Price: $6.95
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Insects and how They Function - Philip S. Callahan - Hardcover
by Callahan, Philip S.
ISBN: 9780823401819
List Price: $6.95